World's Coolest Pools

Hôtel Le Bristol, Paris

Why It's Cool: Fronting the mansard roofs of the Champs-Élysées, the teak-and-glass-enclosed lap pool was a posh 1978 addition to the venerable hotel (and modeled after Aristotle Onassis’s yacht Christina). The property is still an A-list favorite—it even had a cameo in Woody Allen’s Midnight in Paris. lebristolparis.com